Any chance you hit it where you should have and just didn’t have blood? A few years ago I shot one w a powerbelt with some fresh powdery snow on ground. The deer ran off out of sight. When I got to where the deer was no blood….nothing!! Thought no way I missed. Followed the tracks about 100 yards with not even a speck of blood. Walked up to a dead deer. Only blood the only time was a couple pin drops right next to deer. I was shocked at the lack of blood. I’ve had almost the same situation a couple of times when I used my sons 6.5 on a few hunts. If there’s a lot of deer tracks maybe the dog was on the wrong track?